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post #2 of Old 12-14-2007
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Yes, hard chined boats have more drag both because of increased wetted surface and because of turbulance that forms at the chines. In theory the chines could be laid out to match water flow if the boat did not have leeway, but of course boats do have leeway and it is the cross flow of water across the chine that creates turbulence.

If the boat is low performance, and carefully modeled, the induced drag would not be noticable, but on a reasonably high performance, displacement hull, chine drag would be large enough to be significant. Losses in speed due to chine drag is less significant on a planning hull once it is planning.

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